Wrench



H.' E. ROSE.

WRENCH.

APPLICATION FILED JUNVEH, 1921.

Patelfted J an, 3, 1 922. 4

WITNESS:

HARRY E. ROSE, 0F GEARY, OKLAHOMA.

WRENCH.

Application filed June 17,

To all whom it may concern.

e it known that I, HARRY E. Rose, a citizen of the United States, residing at Geary, in the county of Blaine and State of Oklahoma, have invented new and useful Improvements in Wrenches, of which the following is a specification.

This invention relates to improvements in wrenches and has for an object the provision of a wrench inwhich the movable jaw may be quickly operated to provide for rapid adjustment, the adjusting means further providing for adjustment to a small degree.

Another object of the invention is the provision of a wrench in which the shank is provided with teeth for engagement with the teeth of the worm carried by the movable jaw, the construction permitting these teeth to be cut on an exceedingly low pitch so as to prevent retrograde creeping of the movable jaw when the wrench is. in use.

lVith the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings Figure l is a side elevation of a wrench embodying the present invention.

Figure 2 is a similar view showing the movable jaw in longitudinal section.

Figure 3 is a transverse sectional view.

Figure 4 is a detail perspective view of the worm actuating spring, showing the as-' sembling pin by dotted lines.

eferring in detail to the drawings, wherein like characters of reference denote corresponding parts, the invention is shown as comprising a shank 10, which carries at one end a stationary jaw 11.

The movable jaw is indicated at 12 and is carried by a sleeve 13 which receives and slides upon the shank l0,the said sleeve being recessed as shown at 14 for the reception of a worm 15. This worm is positioned for engagement with teeth 16 formed transversely of one end of the shank 10, both the teeth 16 and the teeth of the worm 15 being of relatively low pitch and having Specification of Letters Patent.

the movable jaw toward Patented Jan. 3, 1922.. 1921. Serial No. 478,386.

one face straight and the opposite face inclined as shown, the inclination being toward the stationary jaw 11.

The worm 15 is rotatably mounted within the recess 14 and by means of a pin 17, one end of which is pointed for engagement with a recess 18 formed in the movable jaw and the opposite end is provided with an enlarged threaded extremity 19 for removable engagement with the teeth 16, the said pin carries a coiled spring 21 whose outer diameter is substantially the same as the bore of the worm. Each end of the spring 21 is formed with a concentrically arranged eye 22 which receives the pin 17 so that the latter is centered within the bore of the Worm and the worm yieldingly held in engagement with the teeth 16 of the shank.

, hen it is desired to adjust the wrench to close the jaws, it is only necessary to push the stationary jaw, the yieldable engagement of the worm with the teeth 16 permitting the said worm to ride over the said teeth. The movable jaw may be quickly adjusted in a reverse direc tion by pressing the worm out of engagement with the teeth 16 and holding it in such position until the jaws have been opened the desireddistance. After adjustment has been made in this manner, the worm 15 may be rotated to secure a more accurate adjustment, the edges of the teeth of the worm being tate its operation. As the teeth are of a low pitch, the wrench will be held tightly in its adjusted position so that the loss of time and annoyance due to frequent readjustment is obviated. V j

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claim.

Having described claimed is A wrench comprisinga shank, a stationary jaw carried thereby, a movable jaw slidingly mounted upon the shank, a worm carried by the movable jaw for engagement with teeth provided on the shank, said worm the invention what is knurled or roughened to facilibeing provided with a relatively large bore, to the pin whereby the latter will be nora pin carried by the movable jaw and exmally yieldingly helcl concentrically of the tending through said bore and-a spring 10- Worm to permit of engagement and disencatecl Within and having its. intermediate gagement of said Worm and the teeth of the 5 convolutions of a relatively largediameter shank.

and contacting the Walls of the bore and In testimony whereofl afiix my signature. its end convolutions reduced and secured HARRY E. ROSE. 

